Gas-burner.



INVEIVTOR. filfred liHz/m abrc v A TTORNE YZ v Patented Nov. (3, 1917.

A. H. HUMPHREY.

GAS BURNER.

APPLlCATION FILED JUNE 10. 1916.

We :7 mwr rs Allisi GAS-BURNER.

HUMP HREY,

1 pgovcinents in Gas-Burners, of which the toliowing' is specification.

" elates to improvements in .LlllS inventioi gas burners.

My improved 12m burner is particularly designed me and is especiallywell adapted for use in heating devices of the radiant type, forexample, such as is shown in my application for Lette Patent, filed May18,

1316, Ser. No. 98,337, although my improvements are delrable and readilyadapted for use in various relations where high temperature llanies areparticularly desired.

The main objects of my invention are: First. to provide an improved gasburner pted to produce a high temperature c eeond, to provide animproved gasburner adapted to procuce a high temperature flame withoutback firing, the burner tube below the tip being unol structed.

Third, to provide an improved gasburner capable of burning a. largequantity of gas flame oi? high temperaand of producing a ture' withoutstreaming.

Fourth, to provide an inmroved gas burner which is practicallynoiseless, even when consuming gas under high pressure.

Fifth, to provixc an improved gas burner having very etiicientcombustion of the gas.

Sixth, to provide an improved burner which is simple and very durable instructure.

Further objects, and objects relating to 'al details, will definitelyappear J ll the detailed dcsn'ipli l is ii h the objects of my inventionand means des ribed in the ecilhtation. The invention is ed and pointedout in the a preferred embodiniy invention. is clearly illustrated acoinpanying drawing, forming a. :i this specification, in which: uin isa rear perspective view of a embodying the leaturcs of my invenportionoi the Bunsen tube being away.

ll. a detail View, partially in seo Specification of Letters Patent.

lied form of my improved burner Patented Nov. 45, 1191?.

Application filed June 10, 1916. Serial No. 102,905.

tion, on a line corresponding to line 2-2 of Fig. l, showing my improvedburner installed in a gas heating device of the *adiant type.

Fig. H1 is a plan view of one of my in1- iroved burner tubes.

Fig. IV is a-detail vertical section thereof on a line corresponding toline H of Fig. III.

Fig. V is a plan. view of a slightly moditube, the modification being inthe shape of the tip.

F V1 is a detail plan view of another modified form of my improvedburner tube, the modification being in the shape of the tip.

in the drawing; similar reference characters refer to similar partsthroughout the several views, and the sectional Views are taken looking;in the direction of the little arrows at the ends of the section lines.

Referring to the drawing, the body of my improved burner comprises a topwall 1, side walls 2 and 3, the wall 2 being the front wall and the wall3 being the rear wall, and a bottom wall l. The top wall is fiat and theside walls are uniformly spaced. The bottom wall at is inclined upwardlytoward each end providing a gas chamber of decreasing capacity towardthe ends of the body.

The supply pipe 5 is disposed longitudinally of the body and providedwith an elbow 6 joined to the side wall 3 so that the pipe delivers tothe chamber centrally and at right angles to the side walls thereof. Theadvantage of this is that it secures a substantially even distributionof the gas Within the chamber to the several burner tubes mountedthereon.

The Bunsen tube 7 is provided with the usual air inlets 8. The gasdelivery nozzle is not shown. as its relation to the Bunsen tube will bereadily midcrstood.

The bodv is prov ed with attaching ears 9 at its ends having holes 10adapted to receive the attaching screws. The burner tubes 11 arethreaded into the top 1 of the body.

These burner tubes 11 are preferably rectangular at the tip, as shown inFigs. III, IV and V, which differ slightly in shape. The tubes areprovided with uniformly spaced vertical slits 12 in opposite wallsadapted to receive the flat bars 13, which are arranged in the slits andWelded 0r brazed in position so that they have a heat conducting unionor joint with the walls of the tube. The spaces 14 between these barsconstitute unobstruct ed slot-like jet apertures extending across thetip. The bars are of uniform cross section from end to end, so that thejet apertures are also of uniform cross section from end to end.

I find in practice that very satisfactory results are secured where thethickness of the bars is substantially that of the jet apertures and thedepth of the bars approximately four times the width of the jetapertures. The maintaining of the proper relative proportion in depthand thickness of the bars relative to the jet apertures is of advantagein securing the best results, that is, as when properly proportioned, noadditional means are required to prevent back firing, the burner tubesbeing entirely unobstructed below the tips and, further, the

gas burns quite close to the surface of the tipsand without streaming,even under relatively high pressures. A further advantage of thisarrangement is that the structure is practically noiseless.

The bars being effectively united with the walls of the tube to formheat conducting joints or unions therewith the heat is conducted away sothat they do not become excessively heated so as to destroy them or tocause back firing.

I preferably use a non-corrodible metal and one not affected byconsiderable temperatures, such as certain alloys of nickel and iron.

I have shown my improved burner in Fig. II in operative relation in aheating stove or device of the radiant type, the structure thereillustrated being substantially that of my application above referred toin which the radiants 15 are supported on the base 16 above the burnertubes. The base has openings 17 therein below the radiants.

In heating devices of this character it is of primary importance thatthe radiating elements be brought to a highly heated state and as thecross section of the radiants is small it- 'is necessary that theburners below them be highly efiicient.

My improved burner is especially de signed, as stated, for use in thisrelation. It is also necessary in devices of this type that the gasshall be evenly distributed to the various burner tubes or tips and myimproved burner is also especiallydesigned to accomplish that end.

\Vith my improved burner a suflicient quantity of combustible mixture ispassed without noise and is so distributed that an even flame ofexceedingly high temperature is produced and very'perfect combustion ofthe gas secured. v

As stated, he necessity for screens or the like within the tubes isovercome, which is and metal bars of umior:

of advantage. as such screens choke t of the gas and. further. collectlorcig stances, such as lint and the i the cleaning of the burner atl'ltll litllt inter vals. -Any foreign matter that passes into myimproved burner has unobstructed passage to the lips where it isconsumed.

It is found in practice lhat with gas at normal pressures deliwrcd bythe gas mains of the average city salisliu-tory results may be securedit the jet apertures are be tween the limits of twenty and forty thornsandths of an inch. the bars being oi sub stautially the same thicknessas the width of the aperturcsand the depth ot :he bars up proximatelyfour times the width of the apertures.

With the rectangular lips it is easily pus-- sible to secure uniformity.tips and inserting the bars and brazing or welding them in place asdescribed, satis factory joints areformed bctvseeii the bars and thewalls so that the hea is readily co" ducted from the bars to the wallsand d' pated, thus preventing over heating: of no bars which mightinduce bark tiring or lestroy or warp the bars. By this method ofmanufacture the burners may be cconmnically produced and the bars ma beof dil ferent material from the tubes.

I have not attempted to illustrate or describe various othermodifications than those illustrated and which I might contemplate orwhich might be desirable to adapt my improvements to various uses, as Ibelie the disclosure made will enable those skilled in the art to whichmy invention relates to embody or adapt the same as coniflitions mayrequire.

Having thus described my invention, what I claim as newand desire tosecure by I.- ters Patent, is

1. A gas burner comprising a metal burns tube rectangular at the tip andhaving so tical uniformly spaced slits in opposite W2 lls thereof, andmetal bars of in "form cross section disposed in said slits and unitedto the walls to provide heat conducting unions therewith, the spacesbetween the bars constituting unobstructed slot-like jet apertures ofsubstantially uniform cross section from end to end, the thickness ofthe hrs being substantially that of the ap the depth of the bars beingapprox four times that of the jet ape 2. A gas burner comprising av meburner tube rectangular at the tip and having uni formlv spaced slits inoppos te i Ev therewith, the s1 stituting unobstructed slotof uniformcross section the tip, the depth of the llv slotting lliv Lilstzintially greater than the width of the jet apertures, the thicknessof the bars being substantially that of the jet apertures.

A. gas burner comprising a metal burner tube rectangularat the tip andhaving uniformiy spaced slits in opposite walls thereof, and metal barsof uniform cross section disposed in said slits and united to the wallsof the tube to provide heat conducting unions therewith, the spacesbetween said bars constituting unobstructed slotlike jet apertures ofuniform cross section extending across the tip.

as burner comprising a burner tube,

and bars disposed in a uniformly spaced relation across the tip andunited to the walls of the tube to provide heat conducting unionstherewith, the spaces between said bars constituting slot-like jetapertures of uniform cross section extending across the tip, the depthof the bars being substantially greater than the width of the jetapertures, the thiclc ness of the bars being substantially that of thejet apertures.

5. A gas burner comprising a metal burner tube having opposed slits inthe walls thereof, and metal bars disposed in said slits and united tothe walls to provide heat conducting unions therewith, the spacesbetween said bars constituting unobstructed slot-like jet apertures ofuniform cross section extending across the tip, the depth of the barsrelative to the width of the jet apertures being such as to prevent backfiring therethrough, the tube being unobstructed below the bars.

6. A gas burner comprising a metal burner tube having opposed slits inthe walls thereof, and metal bars disposed in said slits and united tothe walls to provide heat conducting unions therewith, the spacesbetween said bars constituting unobstructed Slot-like jet apertures ofuniform cross section extending across the tip.

7 A gas burner comprising a burner tube, and bars disposed in auniformly spaced relation across the tip, the spaces between said barsconstitutin slot-like jet apertures of uniform cross section extendingacross the tip, the depth of the bars relative to the width of the jetapertures being such as to prevent back firing through the apertures,the tube being unobstructed below the bars. In witness whereof, I havehereunto set my hand and seal in the presence of two witnesses.

ALFRED H. HUMPHREY. [L. 8.: Witnesses:

J. P. Connor, F. E. JORDAN.

